I have been ignoring the red bug problem for a while now simply because only two small corals were affected. the biggest of all was the green slimer. I have not seen it's polyps for several months, it lost color, and the tissue started retracting at the base. I also found some sort of black strands on the dead tissue. There were none on the live. I did not see it moving either. Here are the pics of the slimer: Well the coral are in a small quarantine tank now. I treated them with Bayer Advanced Insect killer as per a thread on RC. It killed a lot of red bugs, but I have no Idea what those black things are.